Aspect and Entity Extraction for Opinion Mining

2014 ◽  
pp. 1-40 ◽  
Author(s):  
Lei Zhang ◽  
Bing Liu
Keyword(s):  
Opinion Mining ◽  
Entity Extraction

scholarly journals Implicit Aspect-Based Opinion Mining and Analysis of Airline Industry Based on User-Generated Reviews

2021 ◽  
Vol 2 (4) ◽  
Author(s):  
Kanishk Verma ◽  
Brian Davis
Keyword(s):  
Ensemble Learning ◽  
Airline Industry ◽  
Opinion Mining ◽  
Conditional Random Fields ◽  
Specific Aspect ◽  
Stochastic Gradient Descent ◽  
Entity Extraction ◽  
Aspect Extraction ◽  
Domain Specific ◽  
Sentence Level

AbstractMining opinions from reviews has been a field of ever-growing research. These include mining opinions on document level, sentence level and even aspect level. While explicitly mentioned aspects from user-generated texts have been widely researched, very little work has been done in gathering opinions on aspects that are implied and not explicitly mentioned. Previous work to identify implicit aspects and opinion was limited to syntactic-based classifiers or other machine learning methods trained on restaurant dataset. In this paper, the present is a novel study for extracting and analysing implicit aspects and opinions from airline reviews in English. Through this study, an airline domain-specific aspect-based annotated corpus, and a novel two-way technique that first augments pre-trained word embeddings for sequential with stochastic gradient descent optimized conditional random fields (CRF) and second using machine and ensemble learning algorithms to classify the implied aspects is devised and developed. This two-way technique resolves double-implicit problem, most encountered by previous work in implicit aspect and opinion text mining. Experiments with a hold-out test set on the first level i.e., entity extraction by optimized CRF yield a result of ROC-AUC score of 96% and F1 score of 94% outperforming few baseline systems. Further experiments with a range of machine and ensemble learning classifier algorithms to classify implied aspects and opinions for each entity yields a result of ROC-AUC score ranging from 71 to 94.8% for all implied entities. This two-level technique for implicit aspect extraction and classification outperforms many baseline systems in this domain.

Opinion Mining on YouTube

2014 ◽  
Author(s):  
Aliaksei Severyn ◽  
Alessandro Moschitti ◽  
Olga Uryupina ◽  
Barbara Plank ◽  
Katja Filippova
Keyword(s):  
Opinion Mining

Index of suicide risk in Mexico using Twitter

2019 ◽  
pp. 1-13
Author(s):  
Luz Judith Rodríguez-Esparza ◽  
Diana Barraza-Barraza ◽  
Jesús Salazar-Ibarra ◽  
Rafael Gerardo Vargas-Pasaye
Keyword(s):  
Social Networks ◽  
Analytic Hierarchy Process ◽  
Suicide Risk ◽  
Opinion Mining ◽  
Real Data ◽  
Analytic Hierarchy ◽  
Specialized Care ◽  
The Analytic Hierarchy Process ◽  
Hierarchy Process

Objectives: To identify early suicide risk signs on depressive subjects, so that specialized care can be provided. Various studies have focused on studying expressions on social networks, where users pour their emotions, to determine if they show signs of depression or not. However, they have neglected the quantification of the risk of committing suicide. Therefore, this article proposes a new index for identifying suicide risk in Mexico. Methodology: The proposal index is constructed through opinion mining using Twitter and the Analytic Hierarchy Process. Contribution: Using R statistical package, a study is presented considering real data, making a classification of people according to the obtained index and using information from psychologists. The proposed methodology represents an innovative prevention alternative for suicide.

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